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Marengo, IA
Full City Profile · Iowa · Iowa County County
3.0
/5.0
B
Good
2,823
Population
1,332/sq mi density
$58,125
Median Income
$29,275 per capita
$114,100
Home Value
$185,647 Zillow
$722
Median Rent
24.5% income on rent
48°F
Avg Temperature
275 sunny days/yr
199
Violent Crime/100K
239 property/100K
B
Overall
3.0 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.0 / 5.0
$58,125 median income, 2.5% unemployment
A+
Affordability
5.0 / 5.0
$114,100 home value, $722/mo rent
F
Safety
1.0 / 5.0
199 violent crimes/100K
C
Education
2.0 / 5.0
12.6% bachelor's degree or higher
Marengo experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 19°F in January while summers reach 73°F in July. The area gets 275 sunny days per year. Annual precipitation totals 36.0 inches. The area receives 27.9 inches of snow annually. Air quality is rated Good with a median AQI of 43.
Temperature
19°F Jan (-7°C)
73°F Jul (23°C)
| Annual Average | 48.2°F |
| 11% below US avg | |
| January Average | 19°F (-7°C) |
| July Average | 73°F (23°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 736 ft (224 m) |
| Area | 2.1 sq mi (5.5 km²) |
| Population Density | 1,332/sq mi |
| Coordinates | 41.7962°N, 92.0681°W |
| Timezone | America/Chicago |
| County | Iowa County County |
| Nearest Airport | The Eastern Iowa (CID) 20 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 28.2 / 100 |
| Social Vulnerability | 19.4 / 100 |
| Community Resilience | 94.1 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Very Low |
| Ice Storm | Relatively Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 19°F (-7°C) | 1.0 in | Coldest |
| February | 25°F (-4°C) | 0.9 in | Driest |
| March | 37°F (3°C) | 2.2 in | |
| April | 50°F (10°C) | 3.6 in | |
| May | 61°F (16°C) | 4.1 in | |
| June | 71°F (21°C) | 4.6 in | Wettest |
| July | 73°F (23°C) | 4.3 in | Warmest |
| August | 72°F (22°C) | 4.5 in | |
| September | 64°F (18°C) | 4.0 in | |
| October | 52°F (11°C) | 2.7 in | |
| November | 37°F (3°C) | 2.3 in | |
| December | 24°F (-4°C) | 1.4 in |
Marengo has a seasonal temperature swing of 54°F / from 19°F in January to 73°F in July. Total annual precipitation is 35.7 inches, with June being the wettest month (4.6") and February the driest (0.9").